Looking at the picture tweeted by Stephen Mullighan, there are several clues to the vantage point. As for height it is definitely lower the the Parliament House parapet and is virtually at the same height as the orange moulding on No 1 King William, the building on the SW corner of the intersection. The North Tce facade of that building is visible which indicates the vantage point is not on 2 KW but is close to the kerb line of North Terrace. The object in the left half of the bottom edge of the photo is a truck with a white cab and brown open tray parked right on the SE corner. The long shadow at the rear of the truck is the jib of the crane used to lift the two track panels into place in North Tce on the north side of 2KW. I wonder if the photo was taken from somewhere on the crane, such as the operating cab or an access platform. The sun is in the east so the photo was taken on Saturday morning. Almost all the rail for the curves and the straight sections adjoining the square crossing was only lifted into place on Friday afternoon.So to reproduce the photo you would need access to a crane or hydraulic platform rather than to 2KW.
Re: News & Discussion: Trams
Posted: Sun Jan 07, 2018 10:35 pm
by Norman
A few photos from this afternoon
Rail laid out along North Terrace
Works are going ahead concreting the intersection.
Re: News & Discussion: Trams
Posted: Mon Jan 08, 2018 11:24 am
by Norman
Update from this morning
The wires to hold up the canary is starting to make an appearance around the western end of the intersection.
The western side of the intersection has also been concreted in.
There is a camera in the south-eastern corner of the intersection, probably recording the timelapse. I wonder if this is the camera Mullighan got his images from.
Southern portion of the intersection ready to be concreted.
A final point. Does anyone agree that the intersection seems to be higher than the road used to be?
Re: News & Discussion: Trams
Posted: Mon Jan 08, 2018 1:03 pm
by Ben
the wire have been put up in front of David Jones and the poles have a significant slant to them now, it doesn't look great and perhaps they weren't as strong as they were thought to be.
the wire have been put up in front of David Jones and the poles have a significant slant to them now, it doesn't look great and perhaps they weren't as strong as they were thought to be.
Those poles do have quite a banana bend. Having said that, there are two span wires there. If one is only temporary during construction, the poles may straighten up. The other poles with only one span wire are not as bent.
The poles are certainly not as strong as the original ones though. If you go to the tram museum at St Kilda (plug plug), the poles holding up the wiring in the depot area have a lot more wire and fittings hanging off them, but with very little visible bending. They are old MTT span poles like the ones being pulled out of North Terrace.
Re: News & Discussion: Trams
Posted: Mon Jan 08, 2018 3:10 pm
by [Shuz]
Well, simple physics would tell you that the newer poles don't have much counterweight on the opposite side of the wiring, hence the bending.
Well, simple physics would tell you that the newer poles don't have much counterweight on the opposite side of the wiring, hence the bending.
Nah. It's simple engineering. The poles installed by the MTT would have been to a British Standard in thise days. They stipulated that the amount of deflection under the load of span wires should be small enough that the bend would not be noticeable in service. You can see what I mean if you look at the poles at the tram museum. You can barely see the bend.
The pole-ish question
20180108_161656.jpg (5.13 MiB) Viewed 2479 times
Edit. I just added an image of the pole. You can see the two span wires. Also, by looking at the other identical poles, you can judge for yourself whether or not it's likely to matter.
Why oh why do my images end up upside down? They're right way up when I post.
